Circuit-interrupter.



C. AALBORG.

CIRCUIT INTERRUPTER.

APPLICATION nun 0017,1903.

Patented Oct. 10, 1911.

2 SHEETS-SHEET 1.

6 :1 -E INVENTOR WITNESSES ATTORNEY COLUMBIA PLANOC RAPH CO-.WASHINGTON. D. c.

G. AALBORG.

CIRCUIT INTERRUPTER.

APPLICATION TILED 00T.7, 1908.

1,005,121 v Patented Oct. 10,1911.

2 SHEETS-SHEET 2.

WITNESSES: I INVENTOR 24 BY Z ATTORNEY coLuMnm'PLANOt-RAPM cu.,WASHINGTON, 04 c.

UNITED STATES PATENT OFFICE.

CHRISTIAN AALBORG, 0F WILKINSBURG, PENNSYLVANIA, ASSIG-NOR, BY MESNEASSIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EASTPITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

'CIRCUIT-INTERRUPTER.

To all whom it may concern:

Be it known that I, CHRISTIAN AALBoRG, a citizen of the United States,and a resident of lVilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Circuit-Interrupters, of which the following is a specification.

My invention relates to oil-immersed electrical apparatus, and it hasspecial reference to such circuit interrupters and switching devices asare provided with oil-immersed contact terminals.

The object of my invention is to provide a tank or fluid-containingcasing which may be removably secured to the main frame or housing ofthe operating mechanism of the device and may be filled by acomparatively small amount of oil or other insulating fluid, variationsin the level of which, by reason of leakage and evaporation, are small.

According to my present invention, I provide a liquid-containing tank toreceive and inclose the separable contact terminals of a circuitinterrupter which has an enlarged' portion adjacent to the surface ofthe liquid when the normal liquid level is maintained, by reason ofwhich considerable leakage and evaporation may take place without anyappreciable change in the liquid level; the quantity of liquid requiredto fill the tank being only. slightly increased.

Figure 1 of the accompanying drawings is a partially sectional elevationof a circuit interrupter embodying my invention, and Figs. 2 and 3 aredetail views of the improved fiuid-containing casing with which theinterrupter is provided.

Referring to the drawings, the device illustrated comprises stationaryand movable contact terminal members 1 and 2, an operating mechanism 3,a fiuid-containing tank or casing 4c in which the contact terminals arelocated, and a main frame or housing 5 for said operative mechanism.

I deem it unnecessary to describe, in detail, the operating mechanismillustrated, since it forms no part of my present invention.

The stationary contact members 1 may be of any suitable form and mayproject downwardly from the bottom of the housing, to

Specification of Letters Patent.

Application filed October 7, 1908.

Patented Oct. 10, 1911.

Serial No. 456,579.

which they are secured, and from which they are insulated by means ofbushings or sleeves 14 of hard insulating material. The movable contactbridging member 2 is connected to the operating mechanism by means of alink 6 by which it is moved into and out of engagement with thestationary member 1.

The tank or fluid-containing casing 4 comprises an outer shell 7, alining 8 of wood or other insulating material and an enlargement 9 whichincreases the cross-sectional area of the tank near its upper end. Theopening 15 in the housing, through which the contact members 5 and thebushings 14 project, is surrounded by a flange 10 to engage a packingstrip 12 which is located in a groove or recess 11 in the upper edge ofthe tank. The bushings 14 are of such length as to project into thespace within the upper end of the lining 8. The tank is secured to thehousing by means of bolts 13 which are located at its corners andproject into the housing, so that it is impossible to remove the tankwithout opening the cover of the housing.

It will, of course, be understood that my structure may be employed inconnection with switching devices which difl'er from those here shown,and I desire that only such limitations shall be imposed as areindicated in the appended claims.

I claim as my invention:

1. In a circuit interrupter, the combination with stationary and movablecontact members, of a liquid-containing casing in which the members aredisposed having an enlargement at the surface of the liquid forincreasing the cross-sectional area at this point.

2. In a circuit interrupter, the combination with stationary and movablecontact members, an operating mechanism and a housing for said operatingmechanism, of a liquid-containing tank for said contact membersremovably secured to the housing by and operating mechaiiism located inthe In testimony whereof, I have hereunto housing, of a fluid-containingtank for said subscribed my name this 21st day of Sepoontaot membershaving an enlargement near tember, 1908.

its upper end, means for clamping said up- CHRISTIAN AALBORG. per end tothe housing and an insulating WVitnesses:

bushing that projects into and through said WM. P. L. HOMMEDIEU,

enlarged portion. RIRNEY HINES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

